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Repair Topics / Engine Valves-1 / Engine Valves-2

MORE: Engine valve stem questions

Car Engine Valves and Valve Train Questions

This category contains featured questions as examples. They relate to most vehicles.

Question: 1992 Mitsubishi Diamante V6 DOHC mileage: 110,000.  I was told my car needed the valve seals in the engine replaced, and my husband wants to do the work himself.  The problem is we can't find a repair manual or any other info to help him.  Can you help us find any kind of manual, video, etc. for my car?  Can you give me any advice on any of the above to replace the valve seals and/or rebuild the whole engine?   Any help you can provide will be greatly appreciated because if my husband can do this work himself it will save us at least $1500.

Answer:   If you are considering rebuilding your engine, we would suggest getting an already rebuilt engine and �swapping� it for yours.  To replace the valve stem seals, remove the cams and apply air pressure in the spark plug hole to hold the valves up.  Next, remove the valve keepers and retainers to expose the seal. Replace as needed to reassemble.



Question: 1993 Geo Metro 3 cylinder, mileage: 119,000. Changing valve stem seals, do I have to remove the head to remove the valve spring? The valve spring is not exposed its down in the head so a regular valve spring compressor cannot grab the spring. Can I push on the spring to remove it as is or do I have to remove the head to get to the seal. Is there a special tool I can use to get it out without removing the head? Trying to do it myself.

Answer: No the head does not need to be removed to replace the valve stem seals. After removing the spark plugs, apply air pressure to the cylinder of the seals to replace. This keeps the valve up while removing the springs and seals. The springs are small and can be pushed by hand or by using a pry bar.

MORE: Engine valve stem questions

Repair Topics / Engine Valves-1 / Engine Valves-2

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